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Subject: Re: [PATCH] perf: Store active software events in a hashlist
From: Peter Zijlstra <peterz@infradead.org>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>,
       Arnaldo Carvalho de Melo <acme@redhat.com>,
       Paul Mackerras <paulus@samba.org>
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Date: Wed, 07 Apr 2010 11:02:26 +0200
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On Mon, 2010-04-05 at 16:08 +0200, Frederic Weisbecker wrote:
> +#define SWEVENT_HLIST_BITS     8
> +#define SWEVENT_HLIST_SIZE     ((1 << (SWEVENT_HLIST_BITS + 1)) - 1)

That seems to result in 9 bits worth, doesn't it?